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    Summary
    EudraCT Number:2018-001671-21
    Sponsor's Protocol Code Number:KRT-232-101
    National Competent Authority:UK - MHRA
    Clinical Trial Type:EEA CTA
    Trial Status:GB - no longer in EU/EEA
    Date on which this record was first entered in the EudraCT database:2018-09-06
    Trial results
    Index
    A. PROTOCOL INFORMATION
    B. SPONSOR INFORMATION
    C. APPLICANT IDENTIFICATION
    D. IMP IDENTIFICATION
    D.8 INFORMATION ON PLACEBO
    E. GENERAL INFORMATION ON THE TRIAL
    F. POPULATION OF TRIAL SUBJECTS
    G. INVESTIGATOR NETWORKS TO BE INVOLVED IN THE TRIAL
    N. REVIEW BY THE COMPETENT AUTHORITY OR ETHICS COMMITTEE IN THE COUNTRY CONCERNED
    P. END OF TRIAL
    Expand All   Collapse All
    A. Protocol Information
    A.1Member State ConcernedUK - MHRA
    A.2EudraCT number2018-001671-21
    A.3Full title of the trial
    An Open-Label, Phase 2a/2b Study of KRT-232 in Subjects With Primary Myelofibrosis (PMF), Post–Polycythemia Vera MF (Post–PV-MF), Or Post–Essential Thrombocythemia MF (Post–ET-MF) Who Have Failed Prior Treatment with a JAK Inhibitor
    A.3.1Title of the trial for lay people, in easily understood, i.e. non-technical, language
    Study of KRT-232 in Subjects with Primary Myelofibrosis (PMF), Post–Polycythemia Vera MF (Post–PV-MF), Or Post–Essential Thrombocythemia MF (Post–ET-MF) Who Have Failed Prior Treatment with a JAK Inhibitor
    A.4.1Sponsor's protocol code numberKRT-232-101
    A.7Trial is part of a Paediatric Investigation Plan No
    A.8EMA Decision number of Paediatric Investigation Plan
    B. Sponsor Information
    B.Sponsor: 1
    B.1.1Name of SponsorKartos Therapeutics, Inc.
    B.1.3.4CountryUnited States
    B.3.1 and B.3.2Status of the sponsorCommercial
    B.4 Source(s) of Monetary or Material Support for the clinical trial:
    B.4.1Name of organisation providing supportKartos Therapeutics, Inc.
    B.4.2CountryUnited States
    B.5 Contact point designated by the sponsor for further information on the trial
    B.5.1Name of organisationKartos Therapeutics, Inc.
    B.5.2Functional name of contact pointClinical Operations
    B.5.3 Address:
    B.5.3.1Street Address275 Shoreline Drive
    B.5.3.2Town/ cityRedwood City, California
    B.5.3.3Post code94065
    B.5.3.4CountryUnited States
    B.5.6E-mailjmei@kartosthera.com
    D. IMP Identification
    D.IMP: 1
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community No
    D.2.5.1Orphan drug designation number
    D.3 Description of the IMP
    D.3.1Product nameKRT-232
    D.3.4Pharmaceutical form Tablet
    D.3.4.1Specific paediatric formulation No
    D.3.7Routes of administration for this IMPOral use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INN-
    D.3.9.2Current sponsor codeKRT-232
    D.3.9.3Other descriptive nameAMG-232
    D.3.10 Strength
    D.3.10.1Concentration unit mg milligram(s)
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number15
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin Yes
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) No
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D.3.11.3.1Somatic cell therapy medicinal product No
    D.3.11.3.2Gene therapy medical product No
    D.3.11.3.3Tissue Engineered Product No
    D.3.11.3.4Combination ATIMP (i.e. one involving a medical device) No
    D.3.11.3.5Committee on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product No
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.IMP: 2
    D.1.2 and D.1.3IMP RoleTest
    D.2 Status of the IMP to be used in the clinical trial
    D.2.1IMP to be used in the trial has a marketing authorisation No
    D.2.5The IMP has been designated in this indication as an orphan drug in the Community No
    D.2.5.1Orphan drug designation number
    D.3 Description of the IMP
    D.3.1Product nameKRT-232
    D.3.4Pharmaceutical form Tablet
    D.3.4.1Specific paediatric formulation No
    D.3.7Routes of administration for this IMPOral use
    D.3.8 to D.3.10 IMP Identification Details (Active Substances)
    D.3.8INN - Proposed INN-
    D.3.9.2Current sponsor codeKRT-232
    D.3.9.3Other descriptive nameAMG-232
    D.3.10 Strength
    D.3.10.1Concentration unit mg milligram(s)
    D.3.10.2Concentration typeequal
    D.3.10.3Concentration number60
    D.3.11 The IMP contains an:
    D.3.11.1Active substance of chemical origin Yes
    D.3.11.2Active substance of biological/ biotechnological origin (other than Advanced Therapy IMP (ATIMP) No
    The IMP is a:
    D.3.11.3Advanced Therapy IMP (ATIMP) No
    D.3.11.3.1Somatic cell therapy medicinal product No
    D.3.11.3.2Gene therapy medical product No
    D.3.11.3.3Tissue Engineered Product No
    D.3.11.3.4Combination ATIMP (i.e. one involving a medical device) No
    D.3.11.3.5Committee on Advanced therapies (CAT) has issued a classification for this product No
    D.3.11.4Combination product that includes a device, but does not involve an Advanced Therapy No
    D.3.11.5Radiopharmaceutical medicinal product No
    D.3.11.6Immunological medicinal product (such as vaccine, allergen, immune serum) No
    D.3.11.7Plasma derived medicinal product No
    D.3.11.8Extractive medicinal product No
    D.3.11.9Recombinant medicinal product No
    D.3.11.10Medicinal product containing genetically modified organisms No
    D.3.11.11Herbal medicinal product No
    D.3.11.12Homeopathic medicinal product No
    D.3.11.13Another type of medicinal product No
    D.8 Information on Placebo
    E. General Information on the Trial
    E.1 Medical condition or disease under investigation
    E.1.1Medical condition(s) being investigated
    Primary Myelofibrosis (PMF), Post–Polycythemia Vera MF (Post–PV-MF), Or Post–Essential Thrombocythemia MF(Post–ET-MF)
    E.1.1.1Medical condition in easily understood language
    A disorder of the bone marrow
    E.1.1.2Therapeutic area Diseases [C] - Cancer [C04]
    MedDRA Classification
    E.1.2 Medical condition or disease under investigation
    E.1.2Version 20.0
    E.1.2Level PT
    E.1.2Classification code 10077161
    E.1.2Term Primary myelofibrosis
    E.1.2System Organ Class 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    E.1.2 Medical condition or disease under investigation
    E.1.2Version 21.0
    E.1.2Level LLT
    E.1.2Classification code 10074689
    E.1.2Term Post polycythemia vera myelofibrosis
    E.1.2System Organ Class 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    E.1.2 Medical condition or disease under investigation
    E.1.2Version 21.0
    E.1.2Level LLT
    E.1.2Classification code 10074690
    E.1.2Term Post essential thrombocythemia myelofibrosis
    E.1.2System Organ Class 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    E.1.3Condition being studied is a rare disease Yes
    E.2 Objective of the trial
    E.2.1Main objective of the trial
    The primary objective of this study is to determine how well the spleen size can be reduced by treatment with the study
    medication.
    E.2.2Secondary objectives of the trial
    To determine the change in modified MPN-SAF Total Symptom Score (TSS) at Week 24 and Week 48;
    To determine the duration of spleen response (DoR-spleen);
    To determine spleen size reduction as measured by palpation;
    To determine red blood cell (RBC) transfusion usage;
    To determine the clinical response rate at Week 24;
    To determine the overall survival (OS) rate;
    To determine the leukemia free survival rate;
    To determine the safety and tolerability of KRT-232;
    To determine the pharmacokinetic/ pharmacodynamic (PK/PD) profile of KRT-232;
    E.2.3Trial contains a sub-study No
    E.3Principal inclusion criteria
    1. Adults >18 years of age
    2. Palpable spleen measuring ≥ 5 cm below the left lower costal margin or spleen volume of ≥ 450 cm3 by MRI or CT scan assessment
    3. Confirmed diagnosis of PMF, post–PV-MF, or post–ET-MF according to the World Health Organization (WHO) criteria
    4. High-risk, intermediate-2 risk, or intermediate-1 risk, defined by Dynamic International Prognostic System (DIPSS)
    5. ECOG performance status of 0 to 2
    6. Adequate hematological, hepatic, and renal organ function (as per protocol definition and within 28 days prior to the first dose of KRT-232)
    7.Female subjects of childbearing potential and their male partners, or male subjects who have female partners of childbearing potential must both use an effective contraception method during the study. In addition, male subjects must continue to use contraception for 3 months and 1 week after the last dose of study drug and female subjects must continue to use contraception for 1 month and 1 week after the last dose of study drug. Effective birth control for males includes either vasectomy or use of condoms. Effective birth control for females includes (a) combined, estrogen and progestogen containing, hormonal contraception (oral, intravaginal, transdermal); (b) progestogen-only hormonal contraception (oral, injectable, implantable); (c) intrauterine device; (d) intrauterine hormone-releasing system; (e) bilateral tubal occlusion; and (f) sexual abstinence, when this is in line with the preferred and usual lifestyle of the subject. Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception.
    Subjects in Part A must meet the following JAK inhibitor treatment failure criteria in order to be eligible for the study:
    JAK Inhibitor treatment failure in Part A must meet either criterion (a) or (b) below:
    a) Either a lack of spleen response defined as receiving at least 12 weeks of JAK inhibitor treatment and having both of the following:
    • Persistent splenomegaly, by physical exam, that is palpable ≥ 5 cm below the lower costal margin (LCM)
    • and TSS of >10 on the MPN-SAF TSS v2.0 or patients with a single symptom score of >5 or two symptoms of >3, including only the symptoms of left upper quadrant pain, bone pain, itching, or night sweats
    b) Or progressive disease any time while on JAK inhibitor treatment as defined by any one of
    the following:
    • Spleen volume increase by ≥ 25% from the nadir as assessed by MRI or CT
    • Appearance of new splenomegaly that is palpable at least 5 cm below the LCM
    • A ≥ 100% increase in palpable distance, below the LCM, for baseline splenomegaly of 5 to 10 cm
    • A ≥ 50% increase in palpable distance, below the LCM, for baseline splenomegaly of > 10 cm
    Subjects in Part B must meet the following ruxolitinib treatment failure criteria in order to
    be eligible for the study.
    Ruxolitinib treatment failure in Part B must meet either criterion (a) or (b) below:
    a) Either a lack of spleen response defined as receiving at least 12 weeks of ruxolitinib treatment and having at least one of the following:
    • For subjects that have a MRI or CT to assess ruxolitinib treatment, failure to have a least ≥ 35% reduction in spleen volume
    • A Baseline splenomegaly prior to ruxolitinib treatment that is palpable at 5 to 10 cm, below the LCM, but remains palpable
    • A Baseline splenomegaly prior to ruxolitinib treatment that is palpable > 10 cm, below the LCM, but does not decrease by at least 50%
    • A Baseline splenomegaly prior to ruxolitinib treatment that is palpable < 5 cm, below the LCM, is not eligible to be considered as a ruxolitinib treatment failure
    b) Or progressive disease any time while on ruxolitinib treatment as defined by any one of
    the following:
    • Spleen volume increase by ≥ 25% from the nadir as assessed by MRI or CT
    • Appearance of new splenomegaly that is palpable at least 5 cm below the LCM
    • A ≥100% increase in palpable distance, below the LCM, for baseline splenomegaly of 5 to 10 cm
    • A ≥ 50% increase in palpable distance, below the LCM, for baseline splenomegaly of > 10 cm
    E.4Principal exclusion criteria
    1. Patients who are positive for p53 mutations
    2. Participation in another interventional clinical trial within the past 4 weeks of the first dose of KRT-232 (participation in observational studies is permitted)
    3. Major surgery within the first 28 days of KRT-232
    4. Chemotherapy, immunomodulatory drug therapy within 14 days prior to first dose of KRT-232
    5. Prior splenectomy
    6. Splenic irradiation within 3 months prior to the first dose of KRT-232
    7. Prior allogeneic stem-cell transplantation or eligible for allogeneic stem cell transplantation
    8. Previous treatment with histone deacetylase (HDAC) inhibitors or BCL-2 inhibitors
    9. Prior MDM2 inhibitor therapy or p53-directed therapy
    10. Women who are pregnant or breastfeeding
    11. History of major organ transplant
    12. Uncontrolled intercurrent illness including, but not limited to, acute hepatitis A; known history of human immunodeficiency virus (HIV)-positive; clinically significant cardiac disease (New York Heart Association Class III or IV); symptomatic congestive heart failure; unstable angina pectoris; ventricular
    arrhythmia; or psychiatric illness/social situations that would limit compliance with study requirements
    13. Subjects with clinically significant bacterial, fungal, parasitic, or viral infection that requires therapy. Subjects with acute bacterial infections requiring antibiotic use should delay screening/enrollment until the course of antibiotic therapy has been completed.
    14. Other malignancy within the last 3 years, other than curatively treated basal cell or squamous cell skin cancer, carcinoma in situ of the cervix, organ-confined or treated nonmetastatic prostate cancer with normal prostate-specific antigen, in situ breast carcinoma after complete surgical resection, or superficial transitional cell bladder carcinoma
    15. Grade 2 or higher QTc prolongation (>480 milliseconds per NCI-CTCAE criteria, version 5.0)
    16. Growth factor treatment (e.g., erythropoeitin) within 14 days prior to first dose of KRT-232; no darbepoetin within 28 days prior to first dose of KRT-232
    17. Active or chronic bleeding within 4 weeks prior to the first dose of KRT-232
    E.5 End points
    E.5.1Primary end point(s)
    The proportion of subjects achieving a ≥35% spleen volume reduction from Baseline to Week 24, as assessed by magnetic resonance imaging (MRI) or computed tomography (CT) scan
    E.5.1.1Timepoint(s) of evaluation of this end point
    The Primary Endpoint will be assessed 24 weeks after each subject is enrolled.
    E.5.2Secondary end point(s)
    Proportion of subjects who have at least 50% reduction from baseline to Week 24 and Week 48 in the total symptom score as measured by the modified MPN-SAF v2.0.
    Duration of a ≥35% or more reduction from Baseline in spleen volume as measured by MRI (or by CT for applicable subjects)
    Reduction in spleen size from Baseline to each visit at which spleen is palpated, including the proportion of subjects who have a ≥50% decrease
    • RBC transfusions (average number of RBC units per patient-month)
    • RBC transfusion independence at Week 24 (proportion of patients who were transfusion-independent at Week 24, defined as absence of RBC transfusions and no hemoglobin <8 g/dL in the previous 12 weeks)
    Complete remission (CR) and partial remission (PR) defined according to International Working Group-Myeloproliferative Neoplasms Research and Treatment (IWG-MRT) and modified European LeukemiaNet (ELN) criteria
    Overall survival is defined as the interval from randomization to death from any cause
    Leukemia-free survival is defined as the interval from randomization to the date of first documented leukemia transformation or death from any cause
    Analyses of the safety endpoints will include the following measurements or assessments: physical
    examinations, laboratory tests, adverse events (AEs), serious AEs (SAEs), ECGs, vital signs
    KRT-232 and acyl glucuronide metabolite (M1) PK parameters, including but not limited to, maximum observed concentration (Cmax), minimum observed concentration (Cmin), area under the plasma concentration-time curve (AUC), and terminal elimination half-life (t1/2z)
    E.5.2.1Timepoint(s) of evaluation of this end point
    Week 24, Week 48 and duration of study. Please refer to protocol for full details.
    E.6 and E.7 Scope of the trial
    E.6Scope of the trial
    E.6.1Diagnosis No
    E.6.2Prophylaxis No
    E.6.3Therapy No
    E.6.4Safety Yes
    E.6.5Efficacy Yes
    E.6.6Pharmacokinetic Yes
    E.6.7Pharmacodynamic Yes
    E.6.8Bioequivalence No
    E.6.9Dose response No
    E.6.10Pharmacogenetic Yes
    E.6.11Pharmacogenomic No
    E.6.12Pharmacoeconomic No
    E.6.13Others No
    E.7Trial type and phase
    E.7.1Human pharmacology (Phase I) No
    E.7.1.1First administration to humans No
    E.7.1.2Bioequivalence study No
    E.7.1.3Other No
    E.7.1.3.1Other trial type description
    E.7.2Therapeutic exploratory (Phase II) Yes
    E.7.3Therapeutic confirmatory (Phase III) No
    E.7.4Therapeutic use (Phase IV) No
    E.8 Design of the trial
    E.8.1Controlled No
    E.8.1.1Randomised Yes
    E.8.1.2Open Yes
    E.8.1.3Single blind No
    E.8.1.4Double blind No
    E.8.1.5Parallel group No
    E.8.1.6Cross over No
    E.8.1.7Other No
    E.8.2 Comparator of controlled trial
    E.8.2.1Other medicinal product(s) Information not present in EudraCT
    E.8.2.2Placebo Information not present in EudraCT
    E.8.2.3Other Information not present in EudraCT
    E.8.2.4Number of treatment arms in the trial4
    E.8.3 The trial involves single site in the Member State concerned No
    E.8.4 The trial involves multiple sites in the Member State concerned Yes
    E.8.4.1Number of sites anticipated in Member State concerned6
    E.8.5The trial involves multiple Member States Yes
    E.8.5.1Number of sites anticipated in the EEA53
    E.8.6 Trial involving sites outside the EEA
    E.8.6.1Trial being conducted both within and outside the EEA Yes
    E.8.6.2Trial being conducted completely outside of the EEA No
    E.8.6.3If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned
    Australia
    Bulgaria
    Canada
    Czechia
    France
    Germany
    Hungary
    Israel
    Poland
    Spain
    United Kingdom
    United States
    E.8.7Trial has a data monitoring committee Yes
    E.8.8 Definition of the end of the trial and justification where it is not the last visit of the last subject undergoing the trial
    LVLS which could be long term survival follow-up phone call
    E.8.9 Initial estimate of the duration of the trial
    E.8.9.1In the Member State concerned years4
    E.8.9.1In the Member State concerned months8
    E.8.9.1In the Member State concerned days2
    E.8.9.2In all countries concerned by the trial years4
    E.8.9.2In all countries concerned by the trial months4
    E.8.9.2In all countries concerned by the trial days1
    F. Population of Trial Subjects
    F.1 Age Range
    F.1.1Trial has subjects under 18 No
    F.1.1.1In Utero No
    F.1.1.2Preterm newborn infants (up to gestational age < 37 weeks) No
    F.1.1.3Newborns (0-27 days) No
    F.1.1.4Infants and toddlers (28 days-23 months) No
    F.1.1.5Children (2-11years) No
    F.1.1.6Adolescents (12-17 years) No
    F.1.2Adults (18-64 years) Yes
    F.1.2.1Number of subjects for this age range: 58
    F.1.3Elderly (>=65 years) Yes
    F.1.3.1Number of subjects for this age range: 145
    F.2 Gender
    F.2.1Female Yes
    F.2.2Male Yes
    F.3 Group of trial subjects
    F.3.1Healthy volunteers No
    F.3.2Patients Yes
    F.3.3Specific vulnerable populations Yes
    F.3.3.1Women of childbearing potential not using contraception No
    F.3.3.2Women of child-bearing potential using contraception Yes
    F.3.3.3Pregnant women No
    F.3.3.4Nursing women No
    F.3.3.5Emergency situation No
    F.3.3.6Subjects incapable of giving consent personally Yes
    F.3.3.6.1Details of subjects incapable of giving consent
    due to anticipated age of patients it's possible a Legally authorised representative may consent for patients.
    F.3.3.7Others No
    F.4 Planned number of subjects to be included
    F.4.1In the member state15
    F.4.2 For a multinational trial
    F.4.2.1In the EEA 132
    F.4.2.2In the whole clinical trial 203
    F.5 Plans for treatment or care after the subject has ended the participation in the trial (if it is different from the expected normal treatment of that condition)
    The study will be considered complete 2 years after the last subject is enrolled, at which time subjects will be evaluated for eligibility for a rollover study.
    G. Investigator Networks to be involved in the Trial
    N. Review by the Competent Authority or Ethics Committee in the country concerned
    N.Competent Authority Decision Authorised
    N.Date of Competent Authority Decision2018-10-02
    N.Ethics Committee Opinion of the trial applicationFavourable
    N.Ethics Committee Opinion: Reason(s) for unfavourable opinion
    N.Date of Ethics Committee Opinion2018-10-03
    P. End of Trial
    P.End of Trial StatusGB - no longer in EU/EEA
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    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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